A student is explaining the forces pushing on a pencil sitting on a desk. What is the force that pushes a pencil up from where the desk it is sitting on?

Gravity

Rolling friction

Normal friction

Sliding friction

State the right hand rule of the direction of magnetic field in a conductor carrying current

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

J. j. thomson’s experiment disproved the theory that an atom